Mercury – Tempest Plus 3-Blade Stainless Steel Propeller | 14.6" Diameter x 21" Pitch | Right-Hand Rotation | 3-Blade | Stainless Steel | Polished Finish | 8M0151382

Overview

There’s nothing like that feeling when your boat launches perfectly onto plane smooth, steady, and full of power. The Mercury Tempest Plus 14.6" x 21" Pitch Propeller (8M0151382) captures that magic. It’s for boaters who know the difference between “good enough” and “just right.” You’ll feel it every time you hit the throttle the quick lift, the firm grip, and that clean pull across the water that just feels right.

Key Features.

• Diameter and Pitch: 14.6-inch diameter, 21-inch pitch
• Rotation: Right-Hand
• Blade Count: 3-Blade design for speed, lift, and precision handling
• Material: Premium stainless steel for durability and consistent performance
• Finish: Polished surface for corrosion resistance and a sharp, refined look.
• Hub System: Compatible with Mercury hub kits (sold separately)
• Design Details: Performance Vent System (PVS) for customizable acceleration and hole-shot control.

Engine & Boat Compatibility.

• Fits Mercury and Mariner 90–115 HP FourStroke Command Thrust outboards
• Works with Mercury and Mariner 135–300 HP TwoStroke and FourStroke outboards.
• Compatible with MerCruiser Alpha One and Bravo One sterndrives
• Excellent choice for bass boats, walleye rigs, and multi-species fishing boats
• Performs well on runabouts and high-performance hulls
• Suitable for both freshwater and saltwater boating.

Performance Benefits.

The Mercury Tempest Plus 8M0151382 brings a sense of balance that’s hard to find in other props. From launch, you’ll feel it grab water firmly and lift your bow with confidence. The 3-blade design is all about clean acceleration fast to plane, steady under load, and smooth at cruising speed.

Once you’re up and running, the prop maintains tight control through turns and high-speed runs. Its large diameter provides strong lift, reducing drag and keeping your boat level even when trimmed high. Whether you’re cutting across open water or maneuvering through choppy conditions, it stays composed and predictable.

Mercury’s Performance Vent System (PVS) adds versatility, letting you fine-tune your setup. Open the vents for a quicker hole shot when lightly loaded, or close them down for more grip under heavy gear or passengers. It’s one of those simple adjustments that make a big difference on the water.

The stainless steel construction resists flexing under torque, ensuring that every bit of engine power transfers directly into thrust. You’ll notice smoother handling, better responsiveness, and long-term reliability — season after season.

Why It’s a Strong Choice

The Mercury Tempest Plus QS8M0151382 is designed for boaters who want a prop that performs — not just once, but every time. It combines strength, precision, and adjustability in a way that aluminum props can’t match.

Its stainless steel build means lasting durability, cleaner performance, and improved efficiency at any speed. The large diameter gives excellent lift for heavier or high-mounted boats, while the PVS vent system makes it easy to dial in the perfect hole shot.

For tournament anglers, performance enthusiasts, or anyone who values control as much as speed, this prop is a clear winner. It’s Mercury engineering at its best — dependable, adaptable, and ready to perform wherever the water takes you.

FAQ

Q1: Which engines does the Mercury Tempest Plus 21" Pitch Propeller fit?

It fits Mercury and Mariner 90–115 HP FourStroke Command Thrust outboards, 135–300 HP TwoStroke and FourStroke outboards, and MerCruiser Alpha and Bravo One sterndrives.

Q2: What makes this propeller different from other Mercury options?

Its larger diameter and PVS venting system deliver exceptional lift, acceleration, and tunable performance, giving you more control over how your boat responds on the water.

Q3: How do I know if this pitch or size is right for my boat?

If your setup uses mid- to high-horsepower engines and you want stronger lift, faster planing, and improved efficiency, the 21-inch pitch is a great fit.

Q4: Can this prop be used in both saltwater and freshwater?

Yes. The polished stainless finish offers long-term corrosion resistance in any boating environment.

Q5: What hub system does it use?

The Tempest Plus requires a Mercury hub kit (sold separately) for a smooth, secure, and vibration-free fit.